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Understanding Galaxies: Types, Formation, and Fun Activities

In this lesson, students will explore the fascinating world of galaxies, learning how to identify and classify different types such as spiral, elliptical, and irregular galaxies. Through creative activities, including writing funny astronomy stories and collaborating to fill in graphic organizers, students will grasp the basics of galaxy formation. They will understand that galaxies are massive clusters of stars, gas, and dust shaped by gravity over billions of years. Join us for an engaging experience that illuminates the mysteries of our universe!

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Understanding Galaxies: Types, Formation, and Fun Activities

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  1. Unit 2: Lesson 4- Galaxies SWBAT: Students will be able to identify and classify the different types of galaxies WOD: intergalactic: Initial Activity: Use the following words to write a funny or creative astronomy story. It’s ok if you don’t know what the words mean, guess! Mini Lesson: What is a galaxy, how does it form? Activity: Identifying the different types of galaxies- partners. Galaxy vocab: • Global cluster • Halo • Disk • Nucleus • Spiral

  2. What is a galaxy? • A large group or cluster of stars held together by gravity. • Made of billions to trillions of stars, gas, and dust. • The universe contains billions of galaxies. Image at http://hubblesite.org/newscenter/archive/releases/galaxy/spiral/2007/41/results/50/

  3. How do galaxies form? • Billions of years after the Big Bang turbulent rotating cosmic clouds of helium and hydrogen collapsed- due to the pull of gravity exceeding outward forces of expansion. • Rotation and gravity shape the galaxy into one of the three types. • Spiral, elliptical, and irregular

  4. Spiral galaxy--Andromeda NOAO/AURA/NSF Images at http://www.noao.edu/image_gallery/html/im0606.html and http://www.noao.edu/image_gallery/html/im0685.html

  5. Elliptical Galaxies Images at http://hubblesite.org/newscenter/archive/releases/galaxy/elliptical/2007/08/image/a/format/large_web/results/50/and http://hubblesite.org/newscenter/archive/releases/galaxy/elliptical/1995/07/results/50/

  6. Irregular Galaxies

  7. The Milky Way Spiral What type of galaxy do you think this is?

  8. Activity: • With your partner: • Read about the different types of galaxies • Fill in the graphic organizer using details from the reading. • Draw an example of each galaxy in the space provided. • Discuss and answer the thought questions.

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